Continuity mistake: Truman is seen in Florida talking with the astronauts prior to lift-off. From the same command center, he controls the entire mission. But Mission Control for all missions is in Houston, Texas. Once the rocket "clears the tower," Mission Control in Houston takes over. How can Truman be in Florida, then appear in Texas a few seconds later?
Factual error: Steve Buscemi opens fire with what appears to be a variant of a General Electric GAU-8/A Gatling Gun which has an effective recoil of approximately 10,000 pounds-force (45 kN) per round discharge of armor-piercing ammunition. The vehicle carrying the cannon does not buck upwards or backwards at all. When the significantly decreased gravity of the asteroid is factored into consideration, at the very least the vehicle should have rocketed backwards or flipped upside down! Additionally, the barrels would have been cold-soaked to something close to -273° Celcius when the spinning asteroid was pointed away from the Sun, the heat generated by the rapid fire rate (combined with the friction of the slugs passing through the barrels) would certainly cause the frigid barrels to shatter like glass. And why would NASA fit a Gatling-Gun on a drilling platform in the first place? There are chemical lasers that would be much more effective and certainly lighter in weight should a mission call for the option of blasting one's way through an obstacle.
Continuity mistake: The montages around the world show a boy listening to a transistor radio. In order to make it look truly Americana the boy has an old-fashioned earphone in one ear but continues to hold the transistor radio up to his ear as though the speaker were working in addition to the headphone. (01:03:40)
Factual error: During the movie's opening scene, you watch the asteroid that killed the dinosaurs some 65 million years hitting Earth near the Caribbean (you can see Cuba and Yucatan). 65 million years ago, Earth's continents were in different locations and most of the Caribbean looked very different.
Continuity mistake: At the beginning of landing shuttles on the asteroid, Col. Sharp, pilot of Freedom, was wearing a black short sleeve T-shirt. At the moment of landing on the ground, he's wearing a flying jacket even not leaving his seat yet. Did he have enough time to put on his jacket during such an emergent situation?
Character mistake: In the President's speech he says that 'The Bible calls this day Armageddon'. That is not correct. In John's Revelation 16 verse 16 it says 'And he gathered them on the place which in Hebrew is called Harmageddon'. Even aside from spelling variations, Armageddon is a place, not a point in time.Jacob La Cour
Other mistake: In the scene where the asteroids are hitting New York, there is an exterior shot of one of them hitting the South end of Grand Central Terminal. Another shot goes by and the film cuts to the main area inside the station, which is close to where the first asteroid hit. There is not one hint of damage, or any discernible reaction from the people inside from the first impact. (00:08:20)Floyd1977
Deliberate mistake: Before the two shuttles dock to the MIR station, Lev initiates a rotation to simulate gravity. The shuttles then dock with their side hatch pointing to the anchorage. As the gravity is pointing away from the centre of revolution and the station is revolving around its main corridor, the gravity would push the astronauts back in to the shuttle and not towards the floor of the gangways leading to the shuttle or towards the floor of the shuttle. Also, the artificial gravity would be reduced to almost nothing at the main corridor. But here the artificial gravity somehow points down in every part of the station, and appears to work equally well throughout the station. (01:09:40)Christoph Galuschka
Continuity mistake: The front of the space shuttle explodes twice. After we see it explode the first time after it first gets bombarded with projectiles, in the very next shot, we see the front half of the plane with two crew members floating around inside at which point we hear: "Houston!". Then the front part of the shuttle blows up again.
Visible crew/equipment: During the scene when the crew is trying to disable the bomb, the camera pans in from a wider shot to a close up twice, once at the start of the scene and once towards the end. During the second pan, on the left side of the screen, the matte box or some other part of the camera can be seen.
Continuity mistake: When AJ bumps into Bear his shirt is very dirty on his right side, but as he runs up the stairs it is much cleaner and has a sweat mark around the neck line. Next shot on the tower and the sweat is not in the same pattern. After he slides down the cable the dirt is in a different pattern again. (00:14:10 - 00:15:00)Bill McIntyre